A woman writes a message for passengers onboard missing Malaysia Airlines Flight MH370 and their family members in Kuala Lumpur (Picture: Samsul Said/Reuters)

The final communication between the cockpit of missing Malaysia Airlines flight MH370 and air traffic control has been revealed and offers two potential clues that increase fears of a hijacking.

A transcript published by the Daily Telegraph reveals 54 minutes worth of communication between the plane’s take-off at Kuala Lumpur airport and its last known position above the South China Sea.

But Malaysian authorities insisted that there was ‘nothing abnormal’ about the communication and that the newspaper transcript was ‘inaccurate’.

Despite those claims aviation experts still speculated that the two potential clues from the transcript suggest something could have been amiss on the plane.

The last known communication from the plane came at the moment it was leaving Malaysian air space (Picture: AFP / Getty)

A message from co-pilot Fariq Abdul Hamid at 1.01am, explaining that the plane was flying at 35,000ft was repeated unnecessarily just six minutes later – and it was within this 30 minute window that the plane’s signalling device was disabled.

The last message was at 1.19am when Mr Fariq uttered the final farewell: ‘All right, good night’ as the plane was exiting Malaysian air space – a separate transponder was then disabled at 1.21am.

‘If I was going to steal the aeroplane, that would be the point I would do it,’ said Stephen Buzdygan, a former British Airways pilot who flew Boeing-777s.

Family members of passengers raise their fists as they shout ‘return our families’ to protest against the lack of new information given by Malaysia’s government (Picture: Jason Lee/Reuters)

‘There might be a bit of dead space between the air traffic controllers … It was the only time during the flight they would maybe not have been able to be seen from the ground,’ he added.

It was around this time that the plane took a sudden, and deliberate, deviation from its flight path.

But Malaysia’s acting transport minister Hishammuddin Hussein explained: ‘The original transcript of the conversation between MH370 and Malaysian air traffic control is with the investigations team, where it is being analysed.

‘As is standard practice in investigations of this sort, the transcript cannot be publicly released at this stage. I can however confirm that the transcript does not indicate anything abnormal.’

Meanwhile the search for debris in an area of the Indian Ocean where two floating objects were spotted by satellite last week has remained fruitless.